Noise supression
Noise supression
(OP)
Does anyone have any ideas on getting rid of unwanted 60 cycle noise on a 4-20ma 2 wire circuit? thanks
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RE: Noise supression
Obviously, if the noise is too large, there may not be anything you can do about it short of shielding everything.
TTFN
RE: Noise supression
RE: Noise supression
If the 'loop' pair is carried in metal raceway, there may be intermittent leakage from ground to the shield part way through the run. Isolating the cable and megging at 100 {not 1,000} volts might flush out the problem. Also, while in operation it may be worthwhile to check for AC current in the whole cable—use a low-range clip-on ammeter around the shield and shielded pair at the grounded end.
RE: Noise supression
RE: Noise supression